<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form action="/login" method="post">
  账号：<input type="text" name="username">
  密码：<input type="password" name="password">
  <input type="submit">
</form>
</body>
</html>